Sub after made basket late in game

[BillyMac]

Girls varsity game a few nights ago. After a breakaway made field goal by B1, the ball rolls toward the foul line, and stops there. A1, by herself in her new backcourt, picks up the ball walks, not runs, but not walking very slowly to delay either, down the lane toward the boundary line to make a throwin. I'm the new trail, and this "makes me go hummm?". When is the ball at her disposal?

1) When she picks it up at the foul line, which means that I'm starting my five second count, and may get to one second, or so, before she's even out of bounds, while I'm ignoring a timeout request from Team B head coach?

2) When she gets out of bounds with the ball, at which point I'm starting my five second count, but if Team B head coach had requested a time out during the time A1 had the ball in bounds, I would have granted it, which would have appeared awkward?

No problem in the game. She just got out of bounds and made the throwin right away, with no time out requests, but it was, like I said, one of "things that make you go hummm?".